Thermo-hydrometer



L. EDELMANN THERMO June 9, 1936.

-HYDROMETER Filed July-'50, 1932 2 Sheets-Sheet 1 L. EDELMANN THERMOJune 9, 1936.

HYDROMETER 2 Sheets-Sheet 2 Filed July 30, 1952 mum Patented June 9,1936I 2,043,405

' UNITED, STATES PATENT] OFFICE THERMO-HYDBOMETER Leo Edelmann, Chicago,111., assignor to E. Edelalhnn & Co., Chicago, 11]., a corporation ofIlli- Application my 30, 1932, Serial No. 627,000

2 Claims. (01. 265-46) My invention relates to improvements, in Fig.4'is a view similar to Fig. 2 illustrating thermo-hydrometers andparticularly to a dea modifled construction;

vice of this character intended for use in testing Fig. 5 is ahorizontal transverse sectional view and measuring the strength ofbattery acids, substantially on line 5-5 of Fig. 4; and

radiator solutions, and other liquid solutions, or- Fig. 6 is afragmentary longitudinal sectional 5- dinarily subject to variations indensity due to view of the lower portion of a hydrometerillustemperature changes. trating another modified construct on.

An object is to provide a thermo-hydrometer As the parts are shown inFigs. 1, 2, and 3, the of simple and compact form, which is of fewliquid and float housing barrel l 15 0 10 parts readily manufactured andassembled, and stantially. cylindrical form in its general lines, 10which presents the various gauge and scale por- "and this barrel orhousing is m 1' 8185s tlons in a manner to be freely and clearly ob,other suitable transparent material. The barrel served and noted intaking readings. or housing I preferably has bead formations 2 Anotherobject is to so construct and mount and 3 at its ends on which arefltted the usual o the parts that the temperature. responsive a dsuction and expulsion bulb I and the usual nozzle indicating portion ispositioned closely adjacent member 5. To all intents and purposes thebarto and adapted to be di ectly immersed in and rel I, the bulb 4 andthe nozzle member 5- can influenced by the same test quantity of liquidbeof substantially standard form and construcas the gauge float. tion,and may be of any desired type as now Still another object is to providean instrument -ordina;rily used in hydrometer and thermo-hy- 20 in whichall of the parts are substantially condrometer structures. tained andcarried by a single barrel or housing At one side the barrel or housingI has an r us r duce the number of parts and the ofilset 6 blown,molded, or otherwise formed to manufacturing operations to a minimum,extend for a considerable distance longitudinally Yet another object isto so construct and throughout the middle portion and to yet leave mountthe parts that the temperature responthe ends adjacent the beads 2 and 3of subsive device, the gauge float and the correction stantlally usualform for reception of the bulb 4 scale can be readily replaced orchanged to thus and nozzle member 5. A better illustrated 111 permit themain portions to be assembled or Fig. 3, this ofiset 6 is preferably soshaped that interchangeably fitted with indicating and scale the chamberformed thereby is open entirely along 30 parts for use with differentsolutions and under the side adjacent the main chamber or openvariousconditions to suit the particular requireing of the barrel or housing I,and the meeting ments of each individual adaptation; edges of the twoportions are preferably slightly A still further object is to provide adevice of drawn in, as indicated at I, so that this openthis character'in which the thermometer or ing is of slightly less width than themaximum other temperature responsive device and the .width of thechamber in the offset portion 6. gauge float are contained in a singlebarrel or The usual gauge float 8 is received in the main housing, andthe temperature responsive device chamber of the barrel or housing I andthe gauge is at all times held and maintained in a position stem 9 ofthis float is appropriately marked by where it will not interfere withor hinder the etching thereon, by enclosing a scale carrying 40 full andfree movement of the gauge float. Sheet, or in any other desired manner.A perfo- With the aboveand' other objects in view, which rated washerormember III is preferably pro-' will be apparent to those skilled inthis art, my vided in the end\of the housing or barrel I to inventionincludes certain novel features of conkeep the gauge float, from entryinto the bulb 4,

5- struction and combinations of parts which will and it is per ppreferable that beads 01' be hereinafter set forth in connection withthe other appropriate formations, be provided around drawings and thenpointed out in the claims. the inner end of the nozzle passage oropening I2 In the drawings: to hold the gauge float. 8 from closing thisFig. l is a view in elevation illustrating a passage. thermo-hydrometerconstructed in accordance Atemperature responsive and indicating mem- 50w i v'i v flem W Fig? 2 is 1 a vertical sectional view taken; in"

plane at right angles to the showing 1;

ber I3,.which in the present instance is shown as a; ei a thermometer. hving a r lat el and straigh capillary: .tube-.ll withla liquid bulb .lilitl n P t;

end, 1 adapted lowermost, and collars or rings II and ll of rubber orother suitable resilient cushion material that will not be affected bythe liquid being tested are fitted around the tube l4 adjacent to theends thereof. These collars or sleeves l5 in consequence these collarsor sleeves I 6 and I I will positively hold the thermometer tube in theproper position within the chamber of the offset portion 6, and willretain the same against accidental or casual movement into the mainchamber of the housing I where it would interfere with full and freemovement of the gauge float.

In the present instance I have shown the capillary tube M of thethermometer I; as graduated and marked oil by etching, or any othersuitable manner, and the scale markings are in degrees of Fahrenheit.This instrument is well adapted for testing radiator solutions todetermine the freezing point of the solution, and the gauge stem 9 ofthe gauge'float 8 has the indicating markings thereon shown asletters ofthe alphabet,

these characters being taken as readily distinguishable and not apt tobe confused with temperature indicating readings of the thermometer. 1With a thermo-hydrometer of this character, having the temperature andgauge float markings shown in the manner described, corrections forvariations in the density of the liquid being tested,

- due to temperature variations, are accomplished by noting the readingof the thermometer and the reading of the gauge float, and then takingthe correction by crossr-reading upon a correction scale; and, it isdesirable and advisable that a the correction scale be assembled as apart of the instrument to be readily visible and freely read withinsubstantially the same field of vision as the thermometer and the floatelement. With this in mind, I provide a correction scale carrying memberl8, substantially in the form of a split sleeve, to be mounted aroundthe lower end of the main portion of the barrel or housing I, with theoifsetportion 6 received within the split opening to thus leave theentire length of the capillary tube of the thermometer it open forreading. This member I8 mounted in the manner set forth does notobstruct the full view of the thermometer, and will not interfere withfree and full reading of the indications on the float gauge, by reasonof the fact that when the gauge is in use it is floating within thebarrel l with the full length of its stem 9 entirely above the upperedge of the sleeve member l8.

Correction scale markings, as indicated at H, can be printed orotherwise placed upon the memher it to be infull view and insubstantially the same field of visionas the markings of the therarearranged substantially at right angles, figures being entered atcrossing points with respect to the two columns to show temperatures atwhich a radiator solution will freeze or solidify sufficiently to causeprobable-damage to the system. This thermo-hydrometer can be used forother purposes and for testing'other solutionsfand for each particularadaptation the markings on the stem 9 and the markingson the correctionscale member |8-wiil be varied to suit the particular requirements.

In Figs. 4 and 5 I have illustrated a modified 5 construction in whichthe barrel or housing I has a relatively larger oflset 8'. A thermometer20, of the capillary tube type, is assembled with the capillary tubeenclosed in a tubularhousing 2|, of glass or other suitable t material,and a scale member 22, of paper or other suitable sheet material, isplaced within this tube 2| back of the capillary tube 2| so that thescale markings and readings on the scale member 22 can be readily viewedand freely read in conjunction with the indicating column within thecapillary tube. Collars or sleeves l6 and I1 are provided around thehousing tube 2| adjacent the ends thereof and fit snugly within theopening of the offset portion i to retain the tube 2| and consequentlythe thermometer, in proper position within the oifset, and againstdisplacement therefrom.

The instrument here shown is perhaps particularly adapted for testingand determining the strength of battery solutions and the like. and thegauge stem sof the gauge float 8' is marked oil. in the usual mannerwith figures now ordinarily recognized as standard for testing batterysolutions. The scale member 22 of the thermometer may have markingsthereon indicating the degrees in temperature, either Fahrenheit orcentigrade, and a correction scale may be employed; however, I havefound it advantageous to mark upon the scale member 22 degrees or pointsto be added to or subtracted from the readings taken on the scale of thegauge stem 9". The ideal or neutral point 23 on this correction scale asmarked on the scale member 22 is here indicatedas being substantially atF., and above this zero point figures are indicated to be added to thereading as taken on the scale of the gauge stem 2, while below the zeropoint figures are shown to be subtracted from the reading on the gaugestem. With this arrangement and marking of the scales it is notnecessary to make cross-readings upon a separate correction scale,andthe final figure or determination is very readily arrived at without anycomplicated readings or computations.

InFig.6Iha veillustratedthebarrel|as provided with the offset 6,substantially the same as shown in Figs. 1, 2, and 3, and in thisinstance the nomle member I is provided with a plug portion 5 to beinserted into the end of 55 the barrel or housing I. Other variations ofthis nature might be made to suit'difi'erent and particular requirementsof use and to adapt my invention to any of the well known types andforms of hydrometer, and thermo-hydmmeter,

constructions.

While I have here shown and described only certain specific embodimentsof my invention and have illustrated and suggested only certain possiblemodifications, it will be appreciated that 65 other changes andvariations can be made in the form, construction, arrangement andassembly of, the parts, and in the showing and arrangement of correctionscales and other features, without departing from the spirit and scopeof 70 my invention.

1 claim:

1. A thermo-hydrometer comprising, a tubular glass liquid barrel oftially cylindrical form in the main, said barrel having an elongatedoffset recess portion lying longitudinally on one side intermediate theends of the barrel, said ofiset recess being open on one side into themain portion of the barrel along one side and being formed in crosssection to be narrowed along the open side to thus form retainingshoulders, a nozzle at one end of the barrel, a

bulb at the other end or the barrel, a gaugefloat in the barrel, athermometer in the offset recess to be thus exposed substantiallythrough out its length to be influenced by liquid in the barrel, andsoft rubber cushion rings between the thermometer and the side walls ofthe recess and frictionally engaging them to hold the thermometer inplace against longitudinal and lateral shifting and displacement, theshoulder portions at the open side of the, recess serving to retain thethermometer in place and to restrict the opening to keep the gaugefloat, from contact with the thermometer tube.

2. A thermo-hydrometer comprising, a tubular transparentliquid-containing barrel of substantially cylindrical form in the main,said barrel having an elongated ofiset recess portion extendinglongitudinally on one side intermediate the ends of the barrel and saidoflset recess being open entirely along its side into the main portionof the barrel and formed along this open side with restricting portions,nozzle and 'suction means mounted respectively at the ends of thebarrel, agauge float in the main portion of the barrel, a thermometer inthe offset recess to thus be exposed substantially throughout its lengthto be influenced by the quantity 0! liquid taken into the barrel toinfluence the gauge float, and compressible cushion rings fitted betweenthe thermometer and the side walls or the recess and i'rictionallyengaging the restricted portions at the sides of the recess to hold thethermometer in place against longitudinal and lateral shifting anddisplacement.

- LEO EDEIMANN.

